Batching machine



April 14, 1953 M. o. HAEGER BATCHING MACHINE 5 Sheets-Sheet 1 FiledMarch 8, 1949 IN VEN TOR.

n 0. Hagger WYM,

April 14, 1953 M. o. HAEGER BATCHING MACHINE 5 Sheets-Sheet 5 FiledMarch 8, 1949 INVENTOR. MLZZ'Q/Z 0. fiagger BY ME c272? W NW NW April14, 1953 M. o. HAEGER BATCHING MACHINE 5 Sheets-Sheet 4 Filed March 8,1949 INVENTOR. M75672 0. 112

BY M,W,W9M.

c/qi 5:

. .QW 1 5 i RE R w a L EEE|IID I WI lll x 4 M O F J E w RN N V a m w o9m ml 2 a WW M 0 s l 3 3 @Q/ o L 4 m n M R m .ww L E n E m mmw G C m m Hm I o m T M m April 14, 1953 Filed March 8 1949 Patented Apr. 14, 1953BATCHING MACHINE Milton 0. Haeger, La Grange Park, Ill., assignor. toAbell-Howe Company, Chicago, Ill., a corpo- I ration of IllinoisApplication March 8, 1949, Serial No. 80,214

This invention relates to machines for use in "the production ofconcrete and analogous mixes, and has to do with a batching machine foraccurately measuring certain of the ingredients of the desired mix.

It is known to provide machines having means for measuring theingredients of the desired mix. Such known machines are, in general, inthe form of central or stationary plants including, as a permanent partthereof, a concrete mixer, and are of quite heavy construction,frequently quite complicated and often quite expensive. To my knowledge,none of the known machines is suitable for use with a separate concretemixer having a charging skip for reception of the ingredients ormaterials to be mixed.

It is of importance that the ingredients of a concrete mix be accuratelyproportioned, to assure maximum strength and emciency for its intendeduse of the resultant concrete. Portable concrete mixers, having acharging skip which receives the ingredients of the mix and dischargesthem into the mixer, are extensively used. In using mixers of this type,the common practice is to throw into the skip a certain number ofshovelfuls of fine aggregate such as sand, and a certain number ofshovelfuls of coarse aggregate, such as crushed stone or gravel, thenumber of shovelfuls of each depending upon the desired mix. Obviously,that method is inaccurate and the batches of concrete mix may varyconsiderably as to proportions of fine and coarse aggregates. Evenassuming that the workmen keep accurate count of the number of shovel?fuls of sand and gravel, for example, which they throw into the skip,the amount of material in one shovelful will vary from that in anothershovelful, and if the workman becomes tired or lazy the variationincreases. There is :also the possibility that the workman may not countthe shovelfuls correctly, which is not un-v common and aggravates thesituation. The cement used in making concrete commonly comes in bagseach containing an accurately measured amount, and presents nodifficulty. Also, the water used in the mix can readily be accuratelymeasured in a container commonly provided for that purpose and presentsno problem. The main difliculty in the use of portable concrete mixersis the inability to proportion accurately the fine and coarseaggregates, as and for the reasons above noted.

My invention is directed to a machine of comparatively simple andinexpensive construction and light Wei h h i measu e accurately 7Claims. (01. 222-135) the aggregates used in concrete mixes and issuited for use with a portable concrete mixer having a skip orequivalent charging means. To that end I provide a batching machinewhich may readily be transported to the site 'where the mixer is to beused and which delivers the aggregates in accurately measured amounts orbatches to the skip of the mixer as required; More particularly, Iprovide measuring hoppers movable to an inner charging position in themachine, in which eachiof them receives a predetermined amount ofaggregataand to an outer discharging position overlying the skip of themixer, into which the contents of the hoppers are discharged. Thehoppers are automatically discharged when they'reach dischargingposition and are automatically recharged when they return to chargingposition. That assures that there will always be the proper amounts ofaggregates in the skip of the mixer prior'to the end of a mixingoperation, which avoids objectionable delay and'is conducive to highoutput of the mixer. Further objects and advantages of my invention willappear from the detail description.

In the drawings:

Figure 1 is a side view of a batching machine embodying my invention,with the measuring hoppers in their inner positions;

Figure 2 is a fragmentary side view of the machine of Figure 1, as seenfrom the opposite side, showing the operating control means includingthe main control switch and the limit switches and associated parts;

Figure 3 is a fragmentary front View, on an enlarged scale, of themachine of Figure 1, showing the lower portion of the storage bin, thecarriage supporting' frames and the carriages thereon and associatedparts, ith one of the measuring hoppers partly broken away and shown insection;

Figure4 is a side view of one of the carriage supporting-frames and thecarriage thereon and associated parts, the carriage being shown in fulllines in its forward or outer position and indicated, in dotted lines,in its rearward or inner position, the carriage'supporting frame beingin part broken away;

Figure 5 is a sectional view, on an enlarged scale, taken substantiallyon line 5-5 of Figure 31, certain parts being broken away and certainother parts beingomitted for clearness of illustration;

Figure 6 is a sectional view, on an enlarged scale, taken substantiallyon line 66 of Figure 3,

certain parts being broken away and the carriage supporting frame beingin part shown in side view;

Figure 7 is a plan view of one of the carriage supporting frames, partlybroken awa and in part broken away and shown in section;

Figure is aplan .view of one .of the carriages;

and i Figure 9 is a sectional view, on an enlarged scale, takensubstantially on line 99 of Figure 8.

As above indicated, the batching machine lei my invention isparticularly suited for use with a, concrete mixing machine iand'i'shalljiiescrihe it as so used, it being understood, however, that the machineof my invention, in its broader aspects, may be used formeasurmgwariousmaterials which are to be used in variousmixes or forother purposes. The batching machine of my invention comprises asuitably formed storage bin i comprising an-upperportion' H which isrectangular shape in plan" and a -lower downwardly tapering portion t?provided, at its midwidth, with an upwardly extending inverted V- shapedrecess 13 extending from front to back thereof. The bin H) "is dividedinteriorly, by 'a partition 14 extending from front to back thereof,into two compartments t and -l6, the partition extending-upward from theapex of the recess l3. The storage bin 41! is suitably mounted andsecured -a "suitably constructed "and braced frame 1 constitutingtherewith a unitary structure. The partition 4-4 extends upward abovethe bin and is provided at "its central portion with a reinforcingstructure or lifting pad I8 having an opening therein for reception of ahook of a crane or like means, whereby the structure including the binand "the frame and the parts carried thereby may be lifted as a unit andplaced upon a float by which it is transported to the site ofoperations.

Each of the compartments 1% and 16 is provided with a depending neck l9which is of rectangular-approximately square-shape in plan and defines adischarge opening leading from that compartment. The neck +9 fits snuglybetween channel 'sidememhers '20, shown more clearly in Figures-5 and"-7, and channel crossmembers 2|, extending between and secured to themembers 20, of a carriage supporting frame 22. The frame 22 furthercomprises :end channel members 23 extending between and 'ssuitablysecured to the side members 20. The side members 2B and the crossmembers 21 are bolted or otherwise suitably secured to neck 19 and theside members 2-0 of frame 122 are also bolted or otherwise secured toanangle cross member 2d of frame 1! at the back thereof. The frame {22is thus supported by neck I19 of compartment of the storage bin H], andby the angle C1955 member 24, .There are two frames 22 each constructedand mounted in the manner described, these two frames being disposedadjacent each other in spaced parallel relation.

Each of the frames 22 supports a carria e '25 of elongated rectangularor oblong Shape in plan, shown more clearly in Figures .5 and'fi. Thecarriage .26 comprises channel-side members 2'] connected by forward andrearward ,yokes -28 suitably secured thereto, one of the yokes 2.8 b ingdisposed at the rearward end of carr age 2B and the other yoke 28 beingdisposed a substantial distance from the forward end of carriage 25. Alower plate 29 extends between the side members '2! of the carriageframe underlying relation thereto, and is welded or otherwise suitablysecured thereto. An upper plate 30 (Figures 5 and 6) seats upon plate29, to which is is welded or otherwise suitably secured, and extendsbetween the side members 27 with its side edges in close proximitythereto. The plates 29 and 30 .extend the full length of .carriage. .25and are provided, adjacent gthe for-ward end thereof, with a chargingopening comprising a substantially semi-circular forward portion 3! anda substantially V-shaped rearward portion 32 which :suldtendsitheforward portion 3 i, as is shown more clearly in Figure 8. .The openingthrough plate llflextendsrearward'beyond the opening through plateauaFigune 59 and the edge of plate 30 de-- fining portion 32 of thecharging opening is beveled upward and forward at 33. That provides.a'cutting edge and inclined or beveled surface extending therefromwhich will readily pass through a column of aggregate extending throughthe charging opening, as will be explained more fully later. I

The 'carriageZB is provided, at each side thereof, with two flangedwheels 35 mounted at the inner face of side members 2?, which are spacedoutward from the side channels Jill of frame 22, which the carriagestraddles. The wheels 35 travel on the lower flanges of channel members20, which thus serve as 'tracks for the carriage wheels. .Angle strips'36 are welded or otherwise suitably secured to the other outer faces ofthe channels 2.!) of frame '22, with'the'ir upper flanges overlying thewheels 35 in proximity thereto, ef fective for restraining the wheelsand .the carriage against upward movement. Thai; guards against bindingdue to tilting of the carriage. The upper face .o'f plaite 38' isdisposed in close proximity to a rectangular wear frame 38 "bolted oromerwise suitably secured to the underfaces of the side members 20 andcross members '21 of the carriage supporting frame 22. It will be clear,from what'has been said, that the members Z0 and 21 define an outletopening 39 leading downward from neck [9, and the frame 3'2 defines anopening 40 in close proximity to the upper face of plate 310.

,A channel member E2 is welded or otherwise suitably secured .tobrackets 43 (Figures 5, 6 and 8), which are welded or otherwise suitablysecured to the underface of plate 29. This channel member 212 .isdisposed midway between the side members 21 of the carriage and extendslengthwise of the latter, preferably from the rearward yoke 28 to theforward yoke. There are, of course, two carriages 26,, both constructedin the .manner .above described, each provided with a channel member Mdisposed as stated. A rack bar .4 is welded or otherwise suitablys'ecured-to the channel member 42 and meshes with a spur pinion '45fixed on a drive shaft 46 rotatably'mounted in suitably disposed bearingblocks 48 carried by an angle cross member 49 of frame H, the outer endof shaft 46 being mounted in a "bearing block 15 carried -by a bracketstructure 5;! suitably secured to frame 11. From what has been said, itwill be clear that when shaft 46 is rotated in one direction thecarriages 26 are moved forwardly toward the front of the frame .11, dwhen the shaft 46 is rotated in the op.po'- Site d rection the carriagesare moved inward or toward the rear of frame IT.

A spur gear 53 is fixed on shaft 46 adjacent the outer end thereof andmeshes with a spur pinion 5d of a speed reducing unit 55, of suitableknown type, appropriately mounted on the frame H. The unit 55 is drivenby an electric motor 56 appropriately mounted on frame ll, through aV-belt 51 passing about the V-pulleys 58 and 59 respectively secured onthe shaft of motor 56 and the driven shaft of unit 55. Within thebroader aspects of my invention, the shaft 46 may be driven by anysuitable reversible driving means.

A panel 62 is suitably mounted on frame I! at one side and adjacent thefront thereof. This panel carries a time relay 63, a reversingcontroller 54, a main control switch 65 and a safety switch 66, all ofsuitable known type. A suitable voltage transformer 61 may also bemounted on the panel 62, where required. A power line receptacle 68 isprovided for establishing, through a suitable electrical cable,connection between the controller 64 and a suitable source of electricalenergy at the site of operations. Two limit switches 69 and Ill aremounted above the carriage 26, switch 69 being adjacent the front offrame I! and switch being a substantial distance in rear of switch 69.Each of the switches 69 and i0 is provided with a downwardly extendingoperating arm ll carrying at its lower end a roller 12. This roller '12is disposed for contact by a trip plate 13 mounted on the carriage 26.It will be understood, of course, that appropriate electricalconnections are provided between the controller 64, relay 63, switch 65,the transformer 61, when used, and the switches 69 and 10.

When the carriage 26 is in its inner or rearward position shown inFigure 2, the trip plate 13 is in contact with roller 12 of the arm llof switch 10, effective for maintaining that switch open. At that time,the switch 69 is closed and the motor 55 is conditioned for driving theshaft 46 in clockwise direction as viewed in Figure 1, but the circuitof motor 56 is then opened through the control switch 65. This latterswitch is a push button type of switch and when button 14 thereof ispressed it is elfective for closing the circuit of motor 56 through thecontroller 64 and the limit switch 69. The carriage 26 is then movedfrom its inner or rearward position to its full forward positionindicated in dotted lines in Figures 1 and 2. As carriage 26 reaches itslatter position, trip plate 13 opens the limit switch 69. Opening ofswitch 69 is effective for reversing the motor 56 and stopping it for ashort period of time predetermined by the relay 53. At the end of thepredetermined time, the circuit of motor 56 is closed, by the relay 63,through the controller 64 and the limit switch l8, it being understoodthat this latter switch closes during the first part of the forwardtravel of carriage 26 and remains closed until the carriage is returnedto its inner or rearward position. When the motor circuit is closed bythe relay 63, the motor 56, the field windings of which have beenreversed as above described, drives the shaft 45 in counter-clockwisedirection, as viewed in Figure 1, thus returning the carriage 26 to itsinner or rearward position, the trip plate 13 opening limit switch 19 asthe carriage reaches that position. That opens the circuit of motor 56,completing one cycle of operation. Pressing button T4 of control circuit65 initiates a succeeding cycle, as will be clear. It will be seen, fromwhat has been said, that by pressing button M of control switch 65, thecarriage 26 is caused to move from its rearward position to its fullforward position, remains in its full forward position for a timepredetermined by the setting of the time relay 63, and is then returnedto its inner or rearward position, in which it remains until the button14 is again pressed, the operation throughout a complete cycle beingentirely automatic.

Each of the carriages 26 is provided, at the forward portion thereof,with a depending measuring or batching hopper. The batching hopper I6for the coarse aggregate, such as crushed stone or gravel, comprises anupper section in the form of a sleeve ll which is rectangular in plan,underlies the forward portion of plate 29 of carriage 26 (Figures 3, 6and 8) and is secured thereto by corner plates 13 welded to sleeve 11and bolted or otherwise'suitably secured to plates 2% and 30 of thecarriage. Angle strips 86 are fixed to the sides of sleeve ll and eachof these strips receives two screw rods 8| suitably securedtherethrough. The hopper 16 is of telescopic construction and furthercomprises a main section or body 82 fitting over and slidable on thesleeve 11. Angle strips 83 are fixed to the sides of body 82 and each ofthe strips 83 has secured therethrough two screw rods 84 disposedcoaxially with the respective rods 81-. The rods 8| and 84 are connectedby a turnbuckle 85, by means of which the main portion or body 82 of thehopper 85 may be adjusted relative to sleeve 11 for varying theeffective capacity of hopper I5, as will be readily understood.Conveniently, the front wall of sleeve H is provided with an appropriatescale, shown more clearly in Figure 3, for indicating the effectivecapacity in cubic feet of the hopper '16 for the respective adjustmentsthereof.

The body 82 of hopper 16 is reduced at its lower portion 8?, thisreduced lower portion 86 being of rectangular cross section with itsinner side wall in the plane of the inner side wall of body 82 and itsouter side wall connected to the outer side wall of body 82 by adownwardly inclined wall 81. The lower end of reduced portion 86 of body82 of the hopper i6 is closed by a gate 88. This gate 88 comprises twoarms 89 pivoted on a pintle rod 90 extending through two straps 9| fixedto the sides of reduced portion 86 of the hopper body 82 and extendingtherebelow. The rear wall 93 of reduced portion 86 of hopper body 82 isinclined downward and forward, as shown more clearly in Figure 4, for apurpose which will be explained more fully presently.

The arms 85} extend rearward a substantial distance beyond the pintlerod 90 and are connected, at their rearward ends, by a cross anglemember 95. The arms 89 are further connected, 2. short distance in rearof pintle rod 96, by a cross member 96. A suitable number of counterweights 9'! are suitably mounted, conveniently by bolting, on the anglecross member 95. A closure plate 98 is suitably secured, conveniently bywelding, on the upper edges of the forward portions of the arms 89, thisplate being of adequate area to close the lower end of the hopper whenin its fully raised or operative position.

A wear bar I613 is secured, conveniently by welding, to the underface ofclosure plate 98 at the forward edge thereof. 'When plate 93 is in itsraised operative position, closing the lower end of the hopper, the bar180 is engaged by bill we of a latch arm I92 fixed on a stub shaft H33rockably mounted, at the front of hopper It, in brackets use and H35welded or otherwise suitably secured to hopper It. The brackets aredisposed in close proximity to the sides of latch arm I02 and, incooperation therewith, restrain the shaft I03 against endwise movement.An upwardly extending angle arm IDS is fixed on the outer end of shaftI03. A flexible trip member or cable Iii-"l, including a turnbuckle 108;is anchored at one'end to the upper end of arm 1105 and, at its otherend,'to1cross member 49 of frame H. The effective "length of trip memberI01 is such that thearm I06 is swung in counter-clockwise direction, asviewed in Figure 4, effective for swinging the latch arm I02 in likedirection to its inoperative or releasing position, when the carriage 26reaches its outermost or discharging position. The other carriage '26carries, at its forward end portion, a hopper its for measuring batchesof sand or'other fine aggregate. The hopper its is somewhat smaller thanhopper 76 but is constructed and mounted in the same manner as thelatter hopper and is provided, at its lower end, with a gate 88 andassociated latch and trip means the same as the gate and the latch andtrip means of the hopper 16. Accordingly, no further description of thehopper I09 and associated parts is necessary. Preferably, the gate 88for hopper 181s provided, at each side thereof, with an upwardlyextending triangular plate H welded or otherwise suitably secured to theplate 93, "which may be extended beyond the arms 89 for that purpose.The plates Hi1 are disposed in close proximity to the side walls :of thereduced portion 86 of hopper body 82, when the gate is in its closedposition, effective for preventing twisting or side thrust of the gate.Likewise, the gate 88 for the hopper [09 may be provided with sideplates or wings Hii, though ordinarily that is not necessary.

It will be clear, from what has been said, that the two carriages '26are operated in like manner and to like extent by rotation of the shaft46 in appropriate direction. i/Vhen the carriages 26 are in their inneror rearward positions, the opening 31-32 of each carriage is disposed inunderlying re'lation to the opening 40 defined by the wear frame 38. Theaggregate from the corresponding compartment of the storage bin [2 thenflows into the hopper, completely filling it, there being a column ofmaterial or aggregate extending from the hopper upward into thecompartment of the bin, as will be understood. In practice, the concretemixer is disposed adjacent the front of frame H, with skip H2 extendingrearwardly a short distance between the two front uprights of the frame,as in Figure 1. The con trol switch 65 is disposed adjacent the front offrame If, so as to be readily accessible to the attendant or operator ofthe mixer. When the button E4 of switch 65 .is pressed, the carriages'26 are moved to their forward discharging posias in Figure 4, and inoverlying relation to the skip H2, as indicated in Figure 1. When thehoppers reach that position, the latch arms 102 are tripped bythemembers HF! and the gates 88 are then swung downward into openposition by the weight of the material within the hoppers. In thatmanner, the aggregates are discharged from the hoppers into the skip H2,and are delivered by the latter to the mixer, it being understood that aproper amount of cement is also placed in the skip and that a properamount of water is added preliminary to, or during, the mixingoperation. The carriages 26 remain in their forward dischargingpositions for a short length of time, predetermined by the setting ofthe time relay 63, sufficient to assure that the aggregates will becompletely discharged from the measuring hoppers. That is desirable inthe :event theaggregates are moist to such an extent as to retarddischarge thereof from the measuring hoppers, while also providing anopportunity for bumping the hoppersto assure complete discharge thereof,if necessary. At the end of the period predetermined bythe time relay,the carriages are returned to their rearward or inner positions,at'which time the gates '88 have been swung to closed position by thecounterweights 91, and latched in such position by the latch arms 32. Inthat connection, when the gate '88 is released, as the carriage 25reaches its outer or discharging position, it is swung downward by theweight of the material within the hopper, as has been explained. l/Vhenthe gate "88 is thus moved to its fully opened position, the angle crossmember '95 strikes a bar I [2, which serves as a bumper, secured to backwall 93 of the reduced portion 86 of 'body 82 of the hopper 16, or ofthe hopper D39, as the case may be.

As the carriages 26 move from their inner or rearward positions to theirouter or forward positions, the plates 30 of the carriages move acrossthe wear frames 38 and part the column of material extendingtherethrough. In that connection, the beveled edge 33 of plate 36provides a cutting element which readily severs the column of materialand reduces likelihood of aggregate jamming between the wear frame itand the edge 33 of plate 3%, it being noted that the wear frame 38projects inward a short distance beyond the members 20 and 2|. That, inconjunction with the beveled edge 33, permits of ready displacementeither upward or downward of particles or pieces of aggregate whichmight otherwise tend to become jammed between wear frame 38 and the edge33 of plate '30, thereby guarding against such jamming. In the forwardor outward movement of the carriages 26, the plates 30 serve as valvesfor closing the openings '48 defined by the wear frames 38, as will beunderstood from Figure 5, in which the carriages 26 are shown in theirouter or discharging'position. Upon return of the carriages 26 to theirinner or rearward position, the measuring hoppers are recharged in themanner previously described. It will be understood that when a measuringhopper is discharged, the gate 83 thereof is returned to closed positionby the counterweights $1, in which position it is latched by the latcharm I02, in the manner previouslydescribed.

As above indicated, changes in detail may be resorted to withoutdeparting from the field and ,scope of my invention, and I intend toinclude all such variations, as fall within the scope of the appendedclaims, in this application in which the preferred form only of myinvention has been disclosed.

I claim:

1. In a batching machine for delivering fine and coarse aggregatesseparately and in measured quantities to a skip of a concrete mixer, asupporting frame, a two compartment bin structure on said frame providedat its lower end with two juxtaposed discharge necks respectivelyopening downward from said compartments, two parallel carriages mountedon said frame respectively underlying said neck-s and movabletransversely of said frame to an outer discharging position projectingbeyond said frame and an inner charging position, batching hoppersdepending from said carriages disposed outward beyond .said frame in thedischarging position of said carriages, releasable gates normallyclosing the lower ends of said hoppers, means controlled by saidcarriages for delivering materials from said bin compartments to saidhoppers when said carriages are in charging position and cutting offdelivery of materials from said bin compartments in all other positionsof said carriages, means for similarly and simultaneously moving saidcarriages to said outer position and to said inner position, and meansfor releasing said gates for opening as said carriages reach dischargingposition.

2. In a batching machine for delivering fine and coarse aggregatesseparately and in measured quantities to a skip of a concrete mixer, asupporting frame, a two compartment bin structure on said frame providedat its lower end with two juxtaposed discharge necks respectivelyopening downward from said compartments, two parallel carriages mountedon said frame respectively underlying said necks and movabletransversely of said frame to an outer discharging position projectingbeyond said frame and an inner charging position, batching hoppersdepending from said carriages disposed outward beyond said frame in thedischarging position of said carriages, the lower portion of each hopperbeing of materially less cross section than the upper portion thereofand ofiset relative to said upper portion toward the other hopper,releasable gates normally closing the lower ends of said hoppers, meanscontrolled by said carriages for delivering materials from said bincompartments to said hoppers when said carriages are in chargingposition and cutting off delivery of materials from said bincompartments in all other positions of said carriage, means forsimilarly and simultaneously moving said carriages to said outerposition and to said inner position, and means for releasing said gatesfor opening as said carriages reach discharging position.

3. In a batching machine for delivering fine and coarse aggregatesseparately and in measured quantities to a skip of a concrete mixer, asupporting frame, a two compartment bin structure on said frame providedat its lower end with two juxtaposed discharge necks respectivelyopening downward from said compartments, two parallel carriages mountedon said frame respectively underlying said necks and movabletransversely of said frame to an outer discharging position projectingbeyond said frame and an inner charging position, batching hoppersdepending from said carriages disposed outward beyond said frame in thedischarging position of said carriages, said hoppers being ofsubstantially rectangular cross section and each having its lowerportion materially reduced in width relative to its upper portion, theinner side wall of the reduced lower portion of each hopper beingsubstantially in the plane of the inner side wall of the upper portionand the outer side wall of the reduced lower portion being connected tothe outer side wall of the upper portion by a downwardly and inwardlyinclined wall, releasable gates normally closing the lower ends of saidhoppers, means controlled by said carriages for delivering materialsfrom said bin compartments to said hoppers when said carriages are incharging position and cutting off delivery of materials from said bincompartments in all other positions of said carriages, means forsimilarly and simultaneously moving said carriages to said outerposition and to said inner position, and means for releasing said gatesfor opening as said carriages reach discharging position.

4. In a batching machine for delivering fine and coarse aggregatesseparately and in meas-. ured quantities to a skip of a concrete mixer,a supporting frame, a two compartment bin structure on said frameprovided at its lower end with two juxtaposed discharge necksrespectively opening downward from said compartments, two parallelcarriages mounted on said frame respectively underlying said necks andmovable transversely of said frame to an outer discharging positionprojecting beyond said frame and an inner charging position, batchinghoppers depending from said carriages disposed outward beyond said framein the discharging position of said carriages, said hoppers being ofsubstantially rectangular cross section and each having its lowerportion materially reduced in width and length relative to its upperportion, the inner side wall of the reduced lower portion of each hopperbeing substantially in the plane of the inner side wall of the upperportion, the outer side wall of the lower reduced portion beingconnected to the outer side wall of the upper portion by a downwardlyand inwardly inclined wall and the rear wall of said lower portion beinginclined downwardly and forwardly from the rear wall of the upperportion, releasable gates normally closing the lower ends of saidhoppers, means controlled by said carriages for delivering materialsfrom said bin compartments to said hoppers when said carriages are incharging position and cutting oif delivery of materials from said bincompartments in all other positions of said carriages, means forsimilarly and simultaneously moving said carriages to said outerposition and to said inner position, and means for releasing said gatesfor opening as said carriages reach discharging position.

5. In a batching machine for delivering fine and coarse aggregatesseparately and in measured quantities to a skip of a concrete mixer, asupporting frame, a two compartment bin structure on said frame providedat its lower end with two juxtaposed discharge necks respectivelyopening downward from said compartments, two parallel carriages mountedon said frame respectively underlying said necks and movabletransversely of said frame to an outer discharging position projectingbeyond said frame and an inner charging position, batching hoppersdepending from said carriages disposed outward beyond said frame in thedischarging position of said carriages, said hoppers being ofsubstantially rectangular cross section and each having its lowerportion materially reduced in width relative to its upper portion, theinner side wall of the reduced lower portion of each hopper beingsubstantially in the plane of the inner side wall of the upper portionand the outer side wall of the reduced lower portion being connected tothe outer side wall of the upper portion by a downwardly and inwardlyinclined wall, closure gates pivoted on the lower ends of said hoppersat the rear thereof, latch means effective for positively holding saidgates closed, means for releasing said latch means and thereby releasingsaid gates for opening as said carriages reach discharging position, andmeans for limiting the extent of opening of said gates and returningthem to closed position.

6. In a batching machine for delivering fine and coarse aggregatesseparately and in measured quantities to a skip of a concrete mixer, asupporting frame, a two compartment bin structure on said frame providedat its lower end with two juxtaposed discharge necks respectivelyopenmg: downward from said, compartments, two parallel carriages mountedon said framerespectively underlying said necks and movable transverselyof said frame to an outer discharging position projecting beyond saidframev and an inner charging position, batching hoppers depending fromsaid carriages disposed outward beyond said frame in the dischargingposition of said carriages, said hoppers being of substantiallyrectangular cross section and each having its lower portion materiallyreduced in width and length relative to its, upper portion, the innerside wall ofthe reduced lower portion of each hopper being substantiallyin the plane of the inner side wall of the upper portion, the outer sidewall of the lower reduced portion being connected to the outer side wallof the upper portion by a downwardly and inwardly inclined wall and therear wallof said lower portion being inclined downwardly and forwardlyfrom the rear wall of the upper portion, closure gates pivoted on thelower ends of said hoppers at the rear thereof, latch means effectivefor positively holding said gates closed, means for releasing said latchmeans and thereby releasing said gates for opening as said carriagesreach discharging position, and means for limiting the extent of openingof said gates and returning them to closed position.

7'. In a batching machine for delivering fine and coarse aggregatesseparately and in measured quantities to a. skip of a concrete mixer, asupporting frame, a two compartment bin structure on said frameprovided, at its lower end with two juxtaposed discharge necksrespectively opening downward from said compartments, two parallelcarriages mounted on said frame respectively underlying said necks andmovable transversely of said frame to: an outer discharging positionprojecting beyond said frame and an inner charging position, batchinghoppers depending from said carriages disposed outward beyond saidframein the discharging position of said. car riages, said hoppers being ofsubstantially rec-- tangular cross section and each having its lowerportion materially reduced in width relative to= its upper portion, theinner side wall of the re'-- duced lower portion of each hopper beingsub stantially in the plane of the inner side wall of the upper portionand the outer side wall of the reduced lower portion being connected tothe outer side wall of the upper portionby a downwardly and inwardlyinclined Wall, closure gates pivoted on the lower ends of said hoppersat the rear thereof, latch means efiectivefor positively holding saidgates closed, means for releasing said latch means and thereby releasingsaid gates for opening as said carriages reach discharging position, andmeans for limiting the extent of opening of said gates and returningthem to closed position, one of said gates having side wings extendingupwardly therefrom in close proximity to the side walls of the lowerportion of the cor-responding hopper.

MILTON O HAEGER.

References Cited in the file of this patent UNITED STATES PATENTS

